Leak-proof lid for a disposable cup



FIG. 1 is a top perspective view of a leak-proof lid for a disposable cup depicted as attached to a disposable cup, showing our new design;

FIG. 2 is a top perspective view of the leak-proof lid for a disposable cup;

FIG. 3 is a front view thereof with a rear view, a left side view, and a right side view being a mirror image;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a cross section view thereof.

The broken line showing of a disposable cup and straw in FIG. 1 illustrates unclaimed environment and forms no part of the claimed design. 

CLAIM The ornamental design for a leak-proof lid for a disposable cup, as shown and described. 